Like this: Pesticides are dangerous chemicals, they kill more than pests.
However, your English teacher may appreciate one of these two revisions:
A category of dangerous chemicals known as pesticides can kill more than pests.
This next revision incorporates the addition of an appositive
Pesticides, a variety of dangerous chemicals, kill more than pests.
You can combine sentences by using conjunctions google it for more info
Physical properties change when chemicals combine because when you mix chemicals the physical properties changes it identity.
To form new substances.
Chlorine and hydration
koti
A written language is based on letters that combine into words that combine into sentences with a meaning.
Various lab implements and apparatus are used to collect or combine chemicals. Beakers, flasks, and test tubes are some examples.
yes (:
using the words: and, yet, so, but
I think oxygen
Minerals in Rocks combine with Chemicals in the air,Chemical Weathering takes place.
Two short sentences may be combined to produce a lengthened single sentence. It is important that the meaning of the combined sentences makes sense.